The resignation comes in the wake of reports that Arvind Kejriwal allegedly tried to poach Congress MLAs to form the government in the national capital last year.
The chorus of dissenting voices within the Aam Aadmi Party reached a crescendo on Wednesday with sidelined senior leaders Yogendra Yadav and Prashant Bhushan coming out openly against Arvind Kejriwal.
The duo wrote an open letter to party volunteers accusing Mr.Kejriwal of trying to align with the Congress for government formation.
Shortly before that, senior AAP leader from Mumbai Anjali Damania resigned from the party after allegations of “horse trading” surfaced against Mr. Kejriwal.
“I quit.. I have not come into Aap for this nonsense. I believed him.. I backed Arvind for principles not Horse-trading,” Ms. Damania tweeted.
In the letter, Mr. Yadav and Mr. Bhushan have alleged that Mr. Kejriwal wanted to form a government in Delhi with Congress support, after the party's drubbing in the Lok Sabha polls.
The duo also denied any move by them to evict Mr. Kejriwal as the national convenor of the party.
“This is an open letter to all AAP volunteers...it will be available everywhere on social media...we hope it will also be publicised by the party as other letters have been,” Mr. Yadav said after releasing the letter.
“We want the party's internal Lokpal to probe all issues,” he added.
Later, Mr. Yadav posted some screenshots of email communications involving him, Mr. Bhushan, Mr. Kejriwal, Kumar Vishwas, Manish Sisodia and Gopal Rai among others.
The emails, written last December, expressed the duo's difference of opinion on some candidates for the Delhi elections.
Mr. Yadav also made his point through a series of tweets from his official handle.
“I welcome the statement by 4 colleagues. Begins the possibility of open, transparent dialogue. Truth shall prevail,” he said referring to a statement made by senior party leaders Manish Sisodia, Gopal Rai, Pankaj Gupta and Sanjay Singh.
In the statement, the four leaders had accused Yogendra Yadav, Prashant Bhushan and Shanti Bhushan of working towards the defeat of AAP in the recently concluded Delhi elections.
“Hope this statement ends all slander, planting of allegations. Hope no more coercion of party functionaries and Delhi MLAs on this issue.”
“Hope PB and my response will also be duly publicised by the party media. Hope party's website will be opened for all volunteers responses,” he tweeted.